CVE-2020-26229

Name: CVE-2020-26229
Creator: NVD / NIST
Published: 2020-11-23T22:15:12.493+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.7/10EPSS 0.64%

Last modified Jun 17, 2026

CVE-2020-26229 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. TYPO3 is an open source PHP based web content management system. In TYPO3 from version 10.4.0, and before version 10.4.10, RSS widgets are susceptible to XML external entity processing. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

Description

TYPO3 is an open source PHP based web content management system. In TYPO3 from version 10.4.0, and before version 10.4.10, RSS widgets are susceptible to XML external entity processing. This vulnerability is reasonable, but is theoretical - it was not possible to actually reproduce the vulnerability with current PHP versions of supported and maintained system distributions. At least with libxml2 version 2.9, the processing of XML external entities is disabled per default - and cannot be exploited. Besides that, a valid backend user account is needed. Update to TYPO3 version 10.4.10 to fix the problem described.

Metrics

CVSS 3.1

3.7/10

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:L

EPSS Probability

0.64%

45.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-611

Affected Software

Vendor	Product	Versions
Typo3	Typo3	>= 10.0.0, < 10.4.10

References

https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-q9cp-mc96-m4w2Third Party Advisory
https://typo3.org/security/advisory/typo3-core-sa-2020-012Vendor Advisory
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-q9cp-mc96-m4w2Third Party Advisory
https://typo3.org/security/advisory/typo3-core-sa-2020-012Vendor Advisory

Timeline

Published: Nov 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26229?

How severe is CVE-2020-26229?

CVE-2020-26229 has a CVSS score of 3.7/10 (LOW severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26229?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-26229?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST